Vision-Based Kinematic Calibration of an H4 Parallel Mechanism: Practical Accuracies - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Journal Articles Industrial Robot: An International Journal Year : 2004

Vision-Based Kinematic Calibration of an H4 Parallel Mechanism: Practical Accuracies

Abstract

Presents the kinematic calibration of an H4 parallel prototype robot using a vision‐based measuring device. Calibration is performed according to the inverse kinematic model method, using first the design model then a model developed for calibration purpose. To do so, the end‐effector pose (i.e. position and orientation) has to be measured with the utmost accuracy. Thus, first the practical accuracy of the low‐cost vision‐based measuring system is evaluated to have a precision in the order of magnitude of 10μ_it;m and 10−3° for a 1,024×768 pixel CCD camera. Second, the prototype is calibrated using the easy‐to‐install vision system, yielding a final positioning accuracy of the end‐effector reduced from more than 1cm down to less than 0.5mm. Also provides a discussion on the use of such a method on commercial systems.

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Dates and versions

lirmm-00108586 , version 1 (23-10-2006)

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Nicolas Andreff, Pierre Renaud, Philippe Martinet, François Pierrot. Vision-Based Kinematic Calibration of an H4 Parallel Mechanism: Practical Accuracies. Industrial Robot: An International Journal, 2004, 31 (3), pp.273-283. ⟨10.1108/01439910410532350⟩. ⟨lirmm-00108586⟩
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